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Finding the Fourth Proportional to 85,881.64, 118,512.50 and 47,642.71

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Solution

The fourth proportional to 85,881.64, 118,512.50 and 47,642.71 is: 65,744.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,881.64 : 118,512.50 = 47,642.71 : x
  2. Step 2: Convert to fraction form
    85,881.64/118,512.50 = 47,642.71/x
  3. Step 3: Cross multiply
    85,881.64x = 118,512.50 × 47,642.71
  4. Step 4: Simplify right side
    85,881.64x = 5,646,256,668.88
  5. Step 5: Solve for x
    x = 5,646,256,668.88/85,881.64
  6. Step 6: Final answer
    x = 65,744.63

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.